High-selectivity triband bandpass filter based on dual-plane microstrip/slotline structure

ABSTRACT A compact and high‐selectivity triband bandpass filter (BPF) is proposed. The filter has a dual‐plane structure, consisting of a pair of dual‐mode open‐loop microstrip resonators and a dual‐mode slotline resonator. Using this structure, three passbands as well as five transmission zeros nea...

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Bibliographic Details
Published in:Microwave and optical technology letters 2015-09, Vol.57 (9), p.2225-2228
Main Authors: Shi, Li-Yun, Wang, Ning, Wu, Lin-Sheng
Format: Article
Language:English
Subjects:
Bandpass filters
dual-mode
dual-plane structure
Local area networks
Microwaves
Resonators
Simulation
slotline
triband
Wireless networks
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Summary:ABSTRACT A compact and high‐selectivity triband bandpass filter (BPF) is proposed. The filter has a dual‐plane structure, consisting of a pair of dual‐mode open‐loop microstrip resonators and a dual‐mode slotline resonator. Using this structure, three passbands as well as five transmission zeros near the passband edges can be generated simultaneously. The triband BPF operating at 1.2 GHz (GPS application), 1.8 GHz (DCS application), and 2.4 GHz (WLAN application) is designed and fabricated. Measurement results agree well with the simulated results. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:2225–2228, 2015
ISSN:0895-2477
1098-2760
DOI:10.1002/mop.29305